Apparatus for manufacturing bands of veneer



Sept. 28 ,1926.

G. SCHLESINGER APPARATUS FOR MANUFACTURING BANDS OF VENEER Filed April 4. 1925 0M 0 m .fl

i y N M retires Y PAT E FM Q GEORG SCHLESINGER, OF BERLIN-CHARLOTTENBURG, GERMANY.

APPARATUS FOR MANUFACTURING BANDS F VENEER.

Application filed April 4, 1925, Serial No. 20,750, and in Germany April 1924.

My invention relates to improvements in apparatus for manufacturing bands of veneer, and more particularly bands of great length used for rolling the same into articles such as casks.

In the manufacture of articles of this type Veneer bands of great length are needed, in which bands the fibre runs longitudinally of the bands, because otherwise the tensile strength of the bands is insuflicient. When cutting a log in the usual way a veneer is produced which has transverse fibres, so that the said veneer is unsuitable for being rolled into articles.

In the manufacture of bands of any desired length suitable for being rolled or otherwise combined into solid articles, the

band made on the veneer cutter is transversely cut into strips of uniform breadth, and the said strips are jointed at their ends by glue and heat. For example, the cutter supplies a band having a transverse fibre and a breadth of two meters. For manufacturing therefrom a band with longitudinal fibre and having a breadth of centimeters, the said band of a breadth of 2 meters is cut into strips of a breadth of 40 centimeters, and the said strips arejointed at their ends in'the manner indicated. If now the said band is directly rolled for example into cylindrical casks, or if it is first wound on a drum for storing the same for later use, such rolling or winding requires a certain tension which is in some cases very high. The strips must be united attheir overlapping ends by means of a suitable liquid binding medium, and the strength of the joints must be suificient to withstand the tensile and bending strains caused by rolling or winding the band, so that they are not partly broken. The object of the improvements is to provide an apparatus for thus winding or rolling the bands, by means of which a band is produced which has strong joints, and with this object in view the apparatus is constructed in such a way that the said ends are not united immediately before winding or rolling, but in which the glued jointis moved through a certain length of way suflicient to allow the glue or cement to set or harden. A reliable joint can be obtained only by applying pressure to the united and glued ends of the strips, and for this reason I provide means for compressing the said joints, which means are mounted so as to travel with the band moving to the rolling or winding apparatus, said compressing apparatus being preferably mounted on a suitable guide way so that it does not bear on the band by gravity. Preferably heating means are combined with the compressing means in order to accelerate drying or setting of the glue, and I prefer to provide electric heating means. To permit continuous operation I mount the said compressing means on an For the purpose of explaining the inven-- tion an example embodying the same has been shown in the accompanying drawing in which the same reference characters have been used in all the views to indicate corresponding parts.

In said drawing,

Fig. 1, is an elevation showing the apparatus, and

Fig. 2 is a top plan view thereof.

In the example shown in the drawing my improved apparatus comprises a drum B adapted to be turned by suitable means such as a hand crank K, and means for supplying strips of veneer to the, said drum. In the example shown in the drawing such means are provided by compressing or clamping members A A A and A, which members are suspended from trolleys M travelling on an endless guide way C including a straight portion above the strips S being fed to the drum B. As shown four compressing members A A A A are provided','the member A being in the position for clamping a pair of strips placed one above the other at their ends and having a suitable glue applied to the contacting faces, the members A and A are on their way towards the drum B, and the member A is ready for being brought into position for clamping the next joint. As appears more particularly from Fig. 1 the upper clamping or pressing jaw P is adapted to be moved towards and away from the relatively fixed jaw P by means of a screwdrums. Further,

threaded spindle acted upon by a hand wheel H. After having united and clamped the ends of the strips the attendant turns the drum B so as to advance the strips through a length of way a, the member A being first operated by its hand wheel H for releasing the joint compressed thereby.

The jaws P and P are provided with electrical heating means, the current being supplied through non-insulated leads N running along the rail C and individual leads E and brushes making contact with the leads N.

In the example shown inthe drawing the clamping or compressing members A A A A are carried along by the strips S, and they are moved only when the drum B 1s turned for winding thereon a portion of the band. In a modification of the invention I provide means for continuously moving the clamping members, in which case the number of the members is such that at the proper time an open clamping member is in position for being applied to a fresh joint. For example, the trolleys M are connected by an endless chain trained on sprocket wheels or automatically operated electrical or mechanical means may be provided for opening and closing the clamping members respectively in the position A and A in which case the continuously operated driving means for the drum B must be operatively connected with the operating mechanism for the trolleys M, and the velocity of the rotation of the drum must be such that the attendant is capable of properly uniting the strips S.

In case of operation of the apparatus by hand for uniting the strips and operating the drum B one man is sufficient. But I have found that the eificiency of the apparatus can be doubled by having two men one for uniting the strips and the other one for turning the drum.

While in describing the invention reference has been made to a particular example embodying the same I wish it to be understood that my invention is not limited to the construction shown in the drawing, and that various changes may be made in the eneral arrangement of the apparatus and t e construction of its parts without departing from the invention.

I claim:

1. In an apparatus for manufacturing bands from strips of veneer, a device for winding or rolling the bandbeing manufactured, gluing means for the edges of the strips, and clamping mechanism for engaging the joined strips at the glued edges, said mechanism being movable with said strips towards said winding or rolling device.

2. In an apparatus for manufacturing bands from strips of veneer, a device for winding or rolling the band being manufactured, gluing means for the edges of the strips, clamping mechanism for engagin the joined strips at the glued edges, said mechanism being movable with said strips towards said winding or rolling device, and supporting means for said clamping mechanism in its movement.

3. In an apparatus for manufacturing bands from strips of veneer, a device for winding or rolling the band being manufactured, gluing means for the edges of the strips, clamping mechanism for engaging the joined strips at the glued edges, said mechanism being movable with said strips towards said winding or rolling devices, and anendless guide-way from which said clamping mechanism is suspended.

4. In an apparatus for manufacturing bands from strips of veneer, a device for winding or rolling the band being manufactured, gluing means for the edges of the strips, clamping mechanism for engagin the joined strips at the glued edges, said mechanism being movable with said strips towards said winding or rolling device, an endless guide-way for supporting said clamping mechanism in its movement, and means for clamping and unclamping said clamping mechanism.

5. In an apparatus for manufacturing bands from strips of veneer, a device for winding or rolling the band being manufactured, gluing means for the edges of the strips, clamping mechanism for engaging the joined strips at the glued edges, said mechanism being movable with said strips towards said winding or rolling device, and heating means for said glued edges associated with said clamping mechanism.

6. In an apparatus for manufacturing bands from strips of veneer, a device for winding or rolling the band being manufactured, gluing means for the edges of the strips, clamping mechanism for engaging the joined strips at the glued edges, said mechanism being movable with said strips signature.

GEORG SCHLESINGER. 

